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 Oxygen
Gas Plants |
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Oxygen Gas Plants
 The
oxygen/nitrogen plants are easily found in capacities from 30 to
1000m3/Hr suitable for producing both industrial and medical oxygen upto
99.9% purity. Upto 99.999% of nitrogen is available while its standard
purity is 96% to 99.5%, since, the production of nitrogen is four times
better than oxygen from the oxygen plant. Highly efficient Expansion engine and trouble free liquid oxygen pump are to be found in this well equipped plant which together help the plant to work on low-pressure cycle resulting leading to high efficiency and low power consumption. Manufacturing Process 1. Compression Of Atmospheric Air By Air Compressor Highly efficient dry-type suction filters are applied for the consuming of free saturated air from the atmosphere into the first stage of the horizontal balanced opposed, lubricated reciprocating air compressor. In the moisture separator from the compressed air the condensed moisture is separated which gets chilled at a temperature of 12 degree centigrade in a chilling unit & is done prior to its entry into the Molecular Sieve Battery. It slowly becomes oil free when passed through an OIL ABSORBER before sending the air to MOLECULAR SIEVE BATTERY. 2. Purification Of Air By Process Skid The chilled air is passed through the Molecular Sieve Battery consisting of Twin Tower packed with Molecular Sieves in order to remove moisture & carbon dioxide from air. The Twin Tower System operates the Molecular Sieve Battery where in this continuous cycle, when one tower is being regenerated by passing waste nitrogen gas at 200°C through a reactivation heater while the other tower is kept under production gets exhausted after an interval of some 8 to 10 hrs & is regenerated by similar process before use. Before entering the AIR SEPARATION COLUMN, the dust particles from the air gets filtered in the DUST FILTER. 3. Cooling Of Air By Expansion Engine (Expander) Before the liquefication process, it is vital that the air is cooled in the air separation unit to temperatures sub-zero (cryogenic), thereafter, its main portion skid enters the expansion engine through the heat exchanger no. I. This lets the air temperature drop to around -165°C by the Expander, sophisticatedly designed with Teflon piston rings assorted with hydraulic mechanism with leak proof ball valves. 3(a). Separation If Liquid Air Into Oxygen And Nitrogen By Air Separation Column The cold gained from outgoing waste nitrogen & oxygen is used for cooling the chilled, oil free and moisture free air at (-80)°C. This further enters into multi-pass HEAT EXCHANGER NO.I while a part of it even enters a multi-pass HEAT EXCHANGER NO. II or LIQUIFIER constructed of special Alloy tubes. The air cools to (-170)°C & prior to its entry into the bottom column before making its way through an expansion valve & this is further cooled & is liquefied due to joule Thompson Effect. Known as the rich liquid, this air later enters into feed tray of top column in the bottom column. While in the top column, POOR LIQUID, a form of liquid nitrogen makes its entry as a reflux. & this takes away the latest heat of condensing Oxygen and gets vaporised. On the other hand, the liquid Oxygen flows down the trays of the top column into the Condenser passes through a Sub-Cooler to a LO Pump. 4. Compression/Withdrawal And Filling Of Oxygen And Nitrogen The liquid oxygen is pumped in Liquid oxygen pump through heat exchanger no. II and I after which it gets gasified before filling in Cylinders in the Filling Manifold. By means of efficient reciprocating LO pump, the pure bone dry Oxygen gas at ambient temperature and high pressure is filled into Oxygen Cylinders through manifold valves. Scope of supply The oxygen/ nitrogen plant's complete package includes the following : 1. Suction Filter ThA highly efficient filter supplied with the compressor
 4.
Expansion EngineBoasting of advantageous features, the engine has motor and starter with bursting disc for safety, hydraulic valve control, completed with flywheel pressure gauge, belt guard, motor pulley v belt, hydraulically operated high efficient engine i.e. the slide rails inter connected copper pipes (inlet and outlet) with ball type of valves stainless steel liner vertical type of German Design. 5. Air Separation Unit (Cold Box) Featuring features like outlet steel casing, bottom column, main heat exchanger, condenser, sub cooler, liquefier, top column, liquid oxygen and nitrogen filter, the unit characterizes cooling pipe line, digital electronic temperature indicator and scanner, PT 100 sensor, insulation material, DP gauge manometer & expansion valve as well. 6. High Pressure Filling Manifold Consisting of main high pressure isolation Valve and Pigtail connection with individual industrial regulation valve with pressure gauge and Safety Relief Valve, it is basically applied for filling high-pressure oxygen to cylinders. 7. Liquid Oxygen Pump This horizontal single acting pump with piston includes piston rings, Safety devices, Non-Return Valves with Stainless Steel Head for long life, Motor and Starter with Pulley, V-Belts, Belt Guard, Inter connecting pipes with A.S.U. which is absolutely perfect for filling oxygen,.
10. Water Softener (optional) For the removal of water hardness & even avoids scaling in Air Compressor Cylinder jacket and water line, it is used & is, therefore, made of HDPE having single multiport valve for different plant valve required for different operations. Technical Specification
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